I have a 99 TL and just had the sh*tty transmission replaced a few months ago by Acura. I changed the OEM spark plugs with a new set of OEMs along with new coil packs. The reason why the coil packs were changed was because I had a code a while back about bad coil packs. When I went to pick up the car after getting a rebuilt transmission, the dealer told me that all 6 cylinders were running lean. I noticed that whenever I step on the gas the engine continues to knock. I'm running 87 gas and noticed only a bare minimal change when I use 91. This car is so much like tofu, it makes my old 87 Camry seem like Superman. Anyone else have problems with the engine knocking syndrome?

 

i would never use 87 gas the lowest i would use is 89 but i only fill 91 or 93 gas.

 

the engine was built with premium in mind, if you run too low of an octane you are going to get detonation. 87 is too low of an octane.

 

87 is not even worth looking at. 89 is 10 cents more and 91/92 is 20 cents more than 87. that adds up to 3 bucks for 15 gallons, i dont see why anyone would hesitate filling with 92.
not that it is THE cure to your problem, just sayin

 

Im sure the continued use of 87 octane gas caused a lot of these problems. In the owners manual it states that you can use 87 if no other gas is available, but to re-fuel with 91 or higher when you can.

The reason you aren't seeing a difference with the 91 fill up is because it's already too late. I would run seafoam through the car, pull and clean the plugs, fill up with premium and check for any codes.

 

Agree with the above. 87 is too low for the engine. It can handle it no problem, but being run for a long period of time may cause problems. I would rather not test that out, but I'm sure someone else here knows. Run Seafoam through the gas tank as well as the intake manifold and get back onto the fuel he engine was made for. It may not make a difference, but think about it. If the 87 fuel caused your engine to have problems, that 20 cent difference per gallon is looking a LOT cheaper than some problems with the engine internally.

 

I can get 90 octane for the price of 87. Does having 1 less octane make that much significant difference in TL in comparison to minimum 91 required?

 

^^^^ How much more is it for 91octane?

I personally love the fact that I can get 93 here in NY for my TL.

 

im guessing you are living with SK, MB or Vancouver? 90 octane should be fine for prolonged use. I'm also guessing you're talking about E-10, which may give you slightly worse MPG

 

You are right. Here in MB, Husky or Mohawk regular with E10 gives 90 octane rating. There is about $0.10/L price difference between regular and premium, or about $0.40/gallon(?) I've tried E10 93 octane and didn't really notice a huge difference to 91 octane with slight mileage decrease.

BTW Go Blue Bombers!